Compare Mont Blanc, frost at midnight and Tintern

I just do not get it........Well, anyway here is my thought and guess. Three poems all have the same key word which is natural. William Wordsworth mainly describes how natural influences it during different stages of life. Also, he also mentions how important his sister is in his heart. In his situation, natural is his passion and author seems it as the spiritual shelter when he goes to the city. Compared to Mont Blanc written by shelley, William inclines to express his love to natural through the poem.  Unlike william, shelley is more obsessed with the serene of the mountain. For the poem Frost at midnight, the author discusses the solitude and tranquility that nature has and expressed his own idea about being alone and praising the beautiful scene. He believes only God can make such a beautiful sound and human is only a part of nature. These three poem all have Platonism, which believed nothing lasts forever only the thought of human has eternity.